Macbook Air logicboard unknown Part? HELP

[tata123]

Macbook Air 13 Logicboard, does anybody now what this Part is?

The metal one!

Thank you !!



http://www.directupload.net/file/d/3...76pan5_jpg.htm

[ben7]

Re: Macbook Air logicboard unknown Part? HELP

Looks like a MOSFET.
I know, you think I'm crazy huh.

But, there are some modern SMD mosfets which have a small metal can like this.
They have quite a low on-state resistance, around a few milliohms.

[tata123]

Re: Macbook Air logicboard unknown Part? HELP

Ok a MOSFET ?? This part gets hot...

Can this part be a smd fuse? i thinkt not?

How can i find this part?

[dellxps15]

Re: Macbook Air logicboard unknown Part? HELP

it's not a fuse. if it's short, check coils. when u spot the shorted one, remove coil and see wich side. after side well'see

[tata123]

Re: Macbook Air logicboard unknown Part? HELP

Ok thanks, wich coils do you mean?

[dellxps15]

Re: Macbook Air logicboard unknown Part? HELP



this coil for exaple i suspect is short as is near the part that is getting hot. check if short and remove it. asfter remove check if short is on A or B. second, give a full image and see what that coil is for : chipset, cpu, video and so on. after that find schematics and well try to spot the coil correspondance on diagram

ps: better to describe the problem: no power on ? no usb, no video ... what problem has this macbook air ?

magsafe green ?

edit: if is macbook air A1370, you should have 7 coils total.

[tata123]

Re: Macbook Air logicboard unknown Part? HELP

the macbook won't turn on, nothing.

mille grazie, for the pic and your describe, i will find the schematic and post it here...

THE LOGICBOARD IS from a 2010 Macbook Air 13

PART NR: 820-2838-A MACBOOK AIR 13 A1369

[dellxps15]

Re: Macbook Air logicboard unknown Part? HELP

no problem man, im here to lear too

once i had a macbook with a hot component. after i said it's hot it's bad and gone for repair, i discovered that it was hot for a short in circuit, so hot= bad it's not the solution. first we need to check for coils, then we see one or other side

i have a 2009 version of air here for sata zif hard drive change (hope is it )

[tata123]

Re: Macbook Air logicboard unknown Part? HELP

friend i will check it out, and write it here, yes the board has 8 coils...

i could not find the schematic...

[tata123]

Re: Macbook Air logicboard unknown Part? HELP

the coil show 0.0 ohm it should be ok??

[dellxps15]

Re: Macbook Air logicboard unknown Part? HELP

to check coil, black wire to usb metal cover, red to one side a time of the coil. multimeter setup for short (if it has that funcion)or in diode mode. 000 001 002 003... is shorted.

[tata123]

Re: Macbook Air logicboard unknown Part? HELP

Ok it shows 1 and didn't beep!!

[dellxps15]

Re: Macbook Air logicboard unknown Part? HELP

we need a schematic and see that coil wich one is on it. let's wait for some expert

[tata123]

Re: Macbook Air logicboard unknown Part? HELP

Ok, the board starts now, but screen is only black screen!!

[sparker1]

Re: Macbook Air logicboard unknown Part? HELP

to check coil, black wire to usb metal cover, red to one side a time of the coil. multimeter setup for short (if it has that funcion)or in diode mode. 000 001 002 003... is shorted.

Thanks. This helped me learn a bit about checking too.

[dellxps15]

Re: Macbook Air logicboard unknown Part? HELP

Ok, the board starts now, but screen is only black screen!!

what have you done to make it start ?

[tata123]

Re: Macbook Air logicboard unknown Part? HELP

it was the intigrated memory it was much of flux under it, the board starts but only black screen...

[moh11]

Re: Macbook Air logicboard unknown Part? HELP

i look for bios dump 820-3462-A